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Re: [Xen-users] Live Migration between different CPUs, cpuid

  • To: "'James Pifer'" <jep@xxxxxxxxxxxxxxxx>, <xen-users@xxxxxxxxxxxxx>
  • From: "Nathan March" <nathan@xxxxxx>
  • Date: Tue, 9 Dec 2014 22:23:17 -0800
  • Delivery-date: Wed, 10 Dec 2014 06:24:47 +0000
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> From: xen-users-bounces@xxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxx] On Behalf Of James Pifer
> Sent: Tuesday, October 29, 2013 1:23 PM
> To: xen-users@xxxxxxxxxxxxx
> Subject: Re: [Xen-users] Live Migration between different CPUs, cpuid
> Mike, 
> You can try the cpuid codes that work in most cases for us. It was a lot of 
> work to get to these, with the help of our vendor. I kind of understand some 
> of it, but not all of it. 
> I like having them in different formats like this so it's easy to determine 
> which one I'm using. (full vs para virt)
> For FV/HVM VMs:
> cpuid=['1:ecx=0x009CE3BD,edx=0xBFEBFBFF','0x80000001:ecx=0x00000001,edx=0x28100800']
> For PV VMs:
> cpuid=['0x0000000D:eax=00000000000000000000000000000000,ebx=00000000000000000000000000000000,ecx=00000000000000000000000000000000,edx=00000000000000000000000000000000','0x00000001:eax=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx,ebx=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx,ecx=10000000100111000010001000100001,edx=00011111110010011000101101110101']
> I don't have one working for Windows 2012 yet.
> Also, not sure what flavor of xen you're running, but we use SLES11/xen and 
> had to have some xen patches for this to work for us. Before the patches, it 
> would start to migrate and you could see it paused on the destination, but 
> then it would disappear.
> HTH,
> James

Hi James,

Dredging up an old thread here, but wondering if you'd mind sharing an updated 
cpuid if you have one server 2012 compatible?

Trying to work one out on my own is driving me slowly insane.


- Nathan

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